/*******************************************************************************
 * Copyright (c) 2021 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * https://www.eclipse.org/legal/epl-2.0/.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *   See git history
 *******************************************************************************/
/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
package org.eclipse.birt.report.engine.executor.css;

/**
 * This exception is thrown when parse errors are encountered. You can
 * explicitly create objects of this exception type by calling the method
 * generateParseException in the generated parser.
 *
 * You can modify this class to customize your error reporting mechanisms so
 * long as you retain the public fields.
 */
public class ParseException extends Exception {

	/**
	 *
	 */
	private static final long serialVersionUID = 5052148729792493800L;

	/**
	 * This constructor is used by the method "generateParseException" in the
	 * generated parser. Calling this constructor generates a new object of this
	 * type with the fields "currentToken", "expectedTokenSequences", and
	 * "tokenImage" set. The boolean flag "specialConstructor" is also set to true
	 * to indicate that this constructor was used to create this object. This
	 * constructor calls its super class with the empty string to force the
	 * "toString" method of parent class "Throwable" to print the error message in
	 * the form: ParseException: <result of getMessage>
	 */
	public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
		super(""); //$NON-NLS-1$
		specialConstructor = true;
		currentToken = currentTokenVal;
		expectedTokenSequences = expectedTokenSequencesVal;
		tokenImage = tokenImageVal;
	}

	/**
	 * The following constructors are for use by you for whatever purpose you can
	 * think of. Constructing the exception in this manner makes the exception
	 * behave in the normal way - i.e., as documented in the class "Throwable". The
	 * fields "errorToken", "expectedTokenSequences", and "tokenImage" do not
	 * contain relevant information. The JavaCC generated code does not use these
	 * constructors.
	 */

	public ParseException() {
		super();
		specialConstructor = false;
	}

	public ParseException(String message) {
		super(message);
		specialConstructor = false;
	}

	/**
	 * This variable determines which constructor was used to create this object and
	 * thereby affects the semantics of the "getMessage" method (see below).
	 */
	protected boolean specialConstructor;

	/**
	 * This is the last token that has been consumed successfully. If this object
	 * has been created due to a parse error, the token followng this token will
	 * (therefore) be the first error token.
	 */
	public Token currentToken;

	/**
	 * Each entry in this array is an array of integers. Each array of integers
	 * represents a sequence of tokens (by their ordinal values) that is expected at
	 * this point of the parse.
	 */
	public int[][] expectedTokenSequences;

	/**
	 * This is a reference to the "tokenImage" array of the generated parser within
	 * which the parse error occurred. This array is defined in the generated
	 * ...Constants interface.
	 */
	public String[] tokenImage;

	/**
	 * This method has the standard behavior when this object has been created using
	 * the standard constructors. Otherwise, it uses "currentToken" and
	 * "expectedTokenSequences" to generate a parse error message and returns it. If
	 * this object has been created due to a parse error, and you do not catch it
	 * (it gets thrown from the parser), then this method is called during the
	 * printing of the final stack trace, and hence the correct error message gets
	 * displayed.
	 */
	@Override
	public String getMessage() {
		if (!specialConstructor) {
			return super.getMessage();
		}
		String expected = ""; //$NON-NLS-1$
		int maxSize = 0;
		for (int i = 0; i < expectedTokenSequences.length; i++) {
			if (maxSize < expectedTokenSequences[i].length) {
				maxSize = expectedTokenSequences[i].length;
			}
			for (int j = 0; j < expectedTokenSequences[i].length; j++) {
				expected += tokenImage[expectedTokenSequences[i][j]] + " "; //$NON-NLS-1$
			}
			if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
				expected += "..."; //$NON-NLS-1$
			}
			expected += eol + "    "; //$NON-NLS-1$
		}
		String retval = "Encountered \""; //$NON-NLS-1$
		Token tok = currentToken.next;
		for (int i = 0; i < maxSize; i++) {
			if (i != 0) {
				retval += " "; //$NON-NLS-1$
			}
			if (tok.kind == 0) {
				retval += tokenImage[0];
				break;
			}
			retval += add_escapes(tok.image);
			tok = tok.next;
		}
		retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn; //$NON-NLS-1$ //$NON-NLS-2$
		retval += "." + eol; //$NON-NLS-1$
		if (expectedTokenSequences.length == 1) {
			retval += "Was expecting:" + eol + "    "; //$NON-NLS-1$ //$NON-NLS-2$
		} else {
			retval += "Was expecting one of:" + eol + "    "; //$NON-NLS-1$ //$NON-NLS-2$
		}
		retval += expected;
		return retval;
	}

	/**
	 * The end of line string for this machine.
	 */
	protected String eol = System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$

	/**
	 * Used to convert raw characters to their escaped version when these raw
	 * version cannot be used as part of an ASCII string literal.
	 */
	protected String add_escapes(String str) {
		StringBuilder retval = new StringBuilder();
		char ch;
		for (int i = 0; i < str.length(); i++) {
			switch (str.charAt(i)) {
			case 0:
				continue;
			case '\b':
				retval.append("\\b"); //$NON-NLS-1$
				continue;
			case '\t':
				retval.append("\\t"); //$NON-NLS-1$
				continue;
			case '\n':
				retval.append("\\n"); //$NON-NLS-1$
				continue;
			case '\f':
				retval.append("\\f"); //$NON-NLS-1$
				continue;
			case '\r':
				retval.append("\\r"); //$NON-NLS-1$
				continue;
			case '\"':
				retval.append("\\\""); //$NON-NLS-1$
				continue;
			case '\'':
				retval.append("\\\'"); //$NON-NLS-1$
				continue;
			case '\\':
				retval.append("\\\\"); //$NON-NLS-1$
				continue;
			default:
				ch = str.charAt(i);
				if (ch < 0x20 || ch > 0x7e) {
					String s = "0000" + Integer.toString(ch, 16); //$NON-NLS-1$
					retval.append("\\u" + s.substring(s.length() - 4)); //$NON-NLS-1$
				} else {
					retval.append(ch);
				}
				continue;
			}
		}
		return retval.toString();
	}

}
